यदि (f(x)=10x+35), तो (f(4x)-f(x)) कब (150) होगा?
If (f(x)=10x+35), when will (f(4x)-f(x)) be (150)?
Explanation opens after your attempt
B. (x=5)
Concept
(f(4x)-f(x)=(40x+35)-(10x+35)=30x). From (30x=150), (x=5).
Why this answer is correct
The correct answer is B. (x=5). (f(4x)-f(x)=(40x+35)-(10x+35)=30x). From (30x=150), (x=5).
Exam Tip
(f(4x)-f(x)=(40x+35)-(10x+35)=30x) है। (30x=150) से (x=5) है।
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